Lug for tread surfaces



N. BEMENT.

LUG FOR TREAD SURFACES.

APPLICATION FILED N0v.15. 1920.

Patented May 2, 1922.

v UNITED NAHUM o. BEMENnor Ro'oKronn; PILL-more.

LUG rortrREAns RrAcEs.

Application filed November is, 1920. serial no. 424545;"

To all whom'it may concern: I r I Be it known that I, NAHUMC. Bn'MnN'T, citizen of the United States, residing at Rockford, Winnebago County, lllinois, have invented certain new and useful Improvements in Lugs for Tread Surfaces, ofwhich the following, taken in connection w th the drawings, is a description. Y

My invention has for its ob3ect the production of an improved tread surface'for' motor vehicle wheels used particularly on power driven mechan sms such as farm tractors. 7 V

The principal object of my invention to provide a'lug for tread surfaces which may be quickly and easily removed from the tread surface and replaced when needed for roadservice or for field work.

A further object of my inventlon s to provide a lug of. this class which'will be self cleaning, the form of its construction being such that under pressure of revolution of the wheel the lug has a rolling action in-"the earth'making its depression,wider than the treadfsurface of the lug, thereby permitting it to be withdrawn without the earth clinging to it.

One of the purposes of my invention is to.

i provide detachable means forming an irregular surface on the tread of the tire so that the wheels of the vehicle may be uti lized for different kinds of service when necessary for road travel or for field work.

Among users of farm tractors it'is well. known that a smooth tread surface will not grip the earth in propelllng the vehlcle for plowing, disking, etc, in connection with regular farm work. 7 Y

My inventlontherefore 1s devised to overcome any ob ect1ons in either case and enable the user to have what might be determined an interchangeable tread surface with changing wheels.

A further object of my invention is to provide lugs for attachmentto the tread surfaces of the vehicle wheels which are so constructed that they may be, readily at tached and removed as desired, which shall,

the device Amer Dreiser 1- SpecificationofLetters ratentr g-fla tentd May2f1922.

be simplein construction, easily and quickly I removed and veryjfeffective for the purpose intended, r Y 1 {In theaccompanying drawings Thave illustrated. what 1 now consider the pre ferred' form of anenibodiment of my detachable lugs and injth ese drawings? Fig. 1 '1s a planview of-a fragment of the tread surfaces of a wheel illustrating attached thereto iniposition lto b'e Fig. 2 is a transverse view of a lugfillus trating the lug attached to the rim of the 'tire, f Fig. 3 illustrates Fig. 4; 'isfa sectional view tal en on, line i i offFigure f, and:

Fig. 5 is a sectional view taken on-lin'e 5-5 of- Figure -1.

. Referring to the drawings A" represents thetread surface of an ordinary vehicle rim ofthe class referred to andwhich may beof any size" suitable 'for the purpose.

is preferably triangular in cross section as more clearly shown in Figures 4 and 5.

1S the lug which is removably 'attached' v .to'the tread surfaces of the rim and hi h The ends 'ofthe lug are provided with in- I wardly bent flanges, a, a, forming recesses, j a,'a', which receive the edges of the, rim

A whenith -lug is placedin iti as shown in Figure 1.

The outer or tread surface I) of this lug B is provided with countersunk recesses and openings 79'', b, through each of which is passed a bolt'C, which extends through the body of the lug and through correspondingopenings in the tread surface of' therim A. Each of these bolts is provided. v with a transverse opening through. the

shank thereof which receives the cotter pin;

on the insideof the rim and locks the parts together clearly shown in Figures 2 and' i. 1

The portions of the lugs through, which the.

bolts'C pass have a reinforced area as shown" more clearly in Figure 4, thebody of the lug otherwise being hollow as shown in section in Figure 5.

In arrangingthe lugs vB upon the rim of the wheel they are positioned diagonally across the tread surface .thereof as illustrated in Figure 1. Each lug is secured by the two bolts-C, G, which are arranged in staggered relation to each other as shown; I V

70."-- a g I a side view of the lug K a 1 d-, fa'sect1onal view of a portion of the wheel IlIIl,

it will he observed that the holding flanges a extend in a direction transversely of the tread surfaces While the face of the lug extends diagonally of the tread surfaces of the rim. By this engagement the strain upon the lugs under pressure of the revolution of the Wheel is taken by the lugs themselves and the flanges engaging over the edges of the rim the bolts serving only to retain the lugs in proper alignment.

When it is to be used in the field the lugs are placed upon the Wheelrim in the manner described, and when the machine to be used on a highway, the cotter pins are removed from the bolts and the lugs lifted off the rim. The operation of putting on and removing the lugs is very simple and only requires the removal of the cotter pins, turn the lugs straight across the rim of the tire NVhQD they may be .readilyremoved. 7

I claim: 7

1. Alug for Wheel rims comprising a hollow body member which is angular in cross section, a-reinforced portion near each end of said lug fastening members extending through each reinforced portion'and through the Wheel T1111, and flanges on the ends of the lug having engagement With the Wheel rim.

2. A lug for Wheel rims comprising a hollow-body member positioned diagonally across the tread surface of the Wheel rim,

reinforced port-ions formed integrally with ertending the lug body attaching 'members extending through openings in each of said reinforced having countersunk openings, and means through said openingsand through the Wheel rim fordetachably securing each lug thereof independently of the other lugs.

4. Lugs forming tread surfaces of Wheel rims each com'risin an an ular hollow V body member attached directly to the Wheel rim, reinforced portions near each end of the lug, a flange at each end of the lug ex tending at'an angle to the longitudinalcenter thereof," the flanges extending parallel with the edge of said wheel rim, and means extending through the reinforced portions of each lug and the Wheel rim for detach abl and inde Jendentl 1 securin each lu 7 t3 17 to the Wheel rim. ln testimony whereof I have signed this specification.

NAHUM C. BEMENT. 

